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Proteins
•are composed of chains of amino acids held together by peptide bonds
•are polymers made from a set of 20 monomers or amino acids
•The Function of Proteins are:
•Body and Cellular Support
•collagen in your skin, hair, bones, and arteries provide strength
•CAM (cell adhesion molecule) proteins anchor cells together
•Organ and Body Movement
•actin and myosin filaments in muscle regulate muscle contraction
•Cellular Communication
•receptors, hormones, and MHC proteins allow cellular communicate
•Transportation of Nutrients
•hemoglobin carries oxygen via red blood cells throughout the body
•Regulation of Physiological Functions
•enzymes, hormones, and neurotransmitters regulate many activities
Protein
Structure
Chain of Amino Acids
Held Together by Peptide Bonds
Has 4 Levels of Structure
Primary
Secondary
Tiertiary
Quarternary
Essential Amino Acids
Peptide Bonds
Teeth
Muscle Tissue
•Skeletal
Muscle Tissue
•Smooth
Muscle Tissue
•Cardiac
Muscle Tissue
Connective
Tissue
•Cartilage
•Bone
•Adipose Tissue
Membrane Proteins
Cell Proteins serve many different purposes
Enzymes
Catalyze chemical
reactions
Protein Sources
Fig. 6-17, p. 204
Legumes
Seed pods (peas),
where nitrogen
is stored
Root nodules,
which capture
nitrogen
Fig. 6-18, p. 205
Meatless Protein?
Fig. 6-13, p. 195
Complementary Proteins
Fig. 6-14, p. 196
Meat, Poultry, Fish, Dried Peas and Beans, and Nuts
Make lean or low-fat choices